GB1176780A - Improvements in Static No-Break Power Supplies. - Google Patents

Improvements in Static No-Break Power Supplies.

Info

Publication number
GB1176780A
GB1176780A GB5277468A GB5277468A GB1176780A GB 1176780 A GB1176780 A GB 1176780A GB 5277468 A GB5277468 A GB 5277468A GB 5277468 A GB5277468 A GB 5277468A GB 1176780 A GB1176780 A GB 1176780A
Authority
GB
United Kingdom
Prior art keywords
circuit
battery
supply
mains
transformer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5277468A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Services Ltd
STC PLC
Original Assignee
Standard Telephone and Cables Pty Ltd
Standard Telephone and Cables PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables Pty Ltd, Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables Pty Ltd
Priority to GB5277468A priority Critical patent/GB1176780A/en
Publication of GB1176780A publication Critical patent/GB1176780A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads

Abstract

1,176,780. Stand-by supply systems. STANDARD TELEPHONES & CABLES Ltd. 7 Nov., 1968, No. 52774/68. Heading H2H. Supply system includes a control circuit which causes a main supply to charge a battery under normal conditions, and connects the battery to an inverter to replace the main supply on failure of the latter. The supply is regulated by a constant voltage transformer. In the circuit shown in Fig. 1, a load 7 is normally fed by mains supply 6 which is connected to the saturated resonant tank circuit of transformer T1. If the mains should fail, the transformer is energized from a battery 1 through a parallel inverter 2. In normal operation, the mains voltage is sufficient to close contacts RLA-1 and RLA-2 so as to supply current to the transformer and also provide a signal to the control circuit 8. The control also receives a signal from the battery, and the charging current fed to the battery using the inverter 2 is adjusted according to the existing state of charge by altering the phase difference of the mains and inverter output. The control circuit 8, Fig. 2 (not shown), includes a unijunction transistor oscillator which determines the output frequency, a bi-stable pulse circuit for providing thyristor gating pulses, a synchronizing circuit, a phaseshifting circuit, and a reference circuit. Modifications, Figs. 3-5 (not shown), include the replacement of switch RLA-1 by a thyristor device, and an alternative control circuit which includes a thermistor for indirectly sensing the battery voltage.
GB5277468A 1968-11-07 1968-11-07 Improvements in Static No-Break Power Supplies. Expired GB1176780A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5277468A GB1176780A (en) 1968-11-07 1968-11-07 Improvements in Static No-Break Power Supplies.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5277468A GB1176780A (en) 1968-11-07 1968-11-07 Improvements in Static No-Break Power Supplies.

Publications (1)

Publication Number Publication Date
GB1176780A true GB1176780A (en) 1970-01-07

Family

ID=10465243

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5277468A Expired GB1176780A (en) 1968-11-07 1968-11-07 Improvements in Static No-Break Power Supplies.

Country Status (1)

Country Link
GB (1) GB1176780A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2212682A1 (en) * 1972-12-29 1974-07-26 Backer Adrien Ets
EP0019932A1 (en) * 1979-06-04 1980-12-10 Tab Products Company Continuous power source with bi-directional converter
GB2145296A (en) * 1983-08-16 1985-03-20 Meidensha Electric Mfg Co Ltd Power supply equipment proof against interruption of service

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2212682A1 (en) * 1972-12-29 1974-07-26 Backer Adrien Ets
EP0019932A1 (en) * 1979-06-04 1980-12-10 Tab Products Company Continuous power source with bi-directional converter
GB2145296A (en) * 1983-08-16 1985-03-20 Meidensha Electric Mfg Co Ltd Power supply equipment proof against interruption of service
US4604530A (en) * 1983-08-16 1986-08-05 Kabushiki Kaisha Meidensha Power supply equipment backup system for interruption of service

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